DNS配置文件，大家帮我看看，什么问题
我想练习一下配置DNS服务器，我是在内网通过路由器上网。我的机器ip:192.168.1.21 外网ip:218.56.175.29 我是在万网注册的petroleumchina.cn的域名，在域名后台管理的截图我也发上来了，他家帮我看看，那里有问题？帮我看一下，谢谢了！named.conf文件如下：
options {
directory "/var/named";
};
zone "." IN {
type hint;
file "named.ca";
};
zone "localhost" IN {
type master;
file "localhost.zone";
allow-update { none; };
};
zone "0.0.127.in-addr.arpa" IN {
type master;
file "named.local";
allow-update { none; };
};
zone "1.168.192.in-addr.arpa" IN {
type master;
file "1.168.192.rev";
};
zone hellolinux.cn IN {
type master;
file "petroleumchina.cn";
};
named.local文件如下：
$TTL 86400
@ IN SOA localhost. root.localhost.(
42 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
IN NS localhost.
1 IN PTR localhost.
localhost.zone文件如下：
$TTL 86400
$ORIGIN localhost.
@ IN SOA @ root.localhost. (
45 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
IN NS @
IN A 127.0.0.1
IN AAAA ::1
IN 86400 NS @
IN 86400 A 127.0.0.1
1.168.192.rev文件如下：
$TTL 86400
@ IN SOA petroleumchina.cn. root.petroleumchina.cn. (
20070502
28800
14400
3600000
86400
)
NSlocalhost.
21 INPTR www.petroleumchina.cn.
22 INPTR mail.petroleumchina.cn.
23 INPTR ftp.petroleumchina.cn.
petroleum.cn文件如下：
$TTL 86400
$ORIGIN petroleumchina.cn
@ IN SOA petroleumchina.cn.root.petroleumchina.cn. (
20070502
28800
14400
3600000
86400
)
NS localhost.
MX 10 mail.petroleumchina.cn.
@ www IN A 192.168.1.21
@ mail IN A 192.168.1.22
@ ftp IN A 192.168.1.23
@ web CNAME www
@ www CNAME localhost 难道没有人知道吗？知道的帮忙看下那里有问题呀，谢谢了！ :P 我看了， 不知道你想问什么？
不是别人不回，我看是没有谁看得懂；
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